Archives For perennial recommendations

As fall approaches and the leaves begin to change, the Chicago Botanic Garden bids adieu to our beautiful summer blooms until next year. The air starts to get crisper (and your summer plants will too), but September isn’t the expiration date for color and excitement at the Chicago Botanic Garden—and it shouldn’t be in your garden either.

We asked Tim Pollak, outdoor floriculturist, and Cindy Baker, manager of horticultural services, for their favorite fall-blooming perennials that will make your landscape pop this season.

PHOTO: Phlox paniculata 'Barfourteen' Purple Flame® garden phlox.

Purple Flame® garden phlox (Phlox paniculata ‘Barfourteen’)

 

Phlox paniculata
Garden phlox

Look no further for a long-blooming and beautiful native perennial that provides a whole palette of color options for your garden. Phlox cultivars add shades of showy pink, lavender, or white in clusters of delicate-looking flowers. Their sweet fragrance will attract late-season butterflies and hummingbirds to your own backyard. Garden phlox are generally hardy plants and will grow well in sun or shade. Plant in midspring with a layer of mulch to retain soil moisture for maximum flower production.

PHOTO: Panicum virgatum 'Dallas Blues' switchgrass.

Switchgrass (Panicum virgatum ‘Dallas Blues’)

Panicum sp.
Switchgrass

Ornamental grasses may not seem like an obvious choice for garden excitement but they can help to create texture and movement. Switchgrasses are an environmentally smart choice as they are native to tallgrass prairies in the United States. Cultivars are variable in color with red to light golden blooms and deep green to blue blades. Switchgrasses are low maintenance and will tolerate nutrient-poor soils, but plant in full sun to keep plants upright and blooming all fall. Because they can grow up to 8 feet in height, consider planting toward the back of your beds and place smaller plants in front.

PHOTO: Callicarpa japonica 'Leucocarpa' (Japanese beautyberry).

Japanese beautyberry (Callicarpa japonica ‘Leucocarpa’)

Callicarpa sp.
Beautyberry

This small shrub has something to offer year-round; it blooms in the summer, then its flowers are replaced by small berries that last until winter. Depending on the species, Callicarpa can have shiny white or bright purple berries—both are a big hit with birds. All species have long, arching branches that cascade outward but with pruning, the shape is variable. Beautyberry should be planted in rich soil and pruned in early spring but otherwise requires little attention throughout the year. Ensure your shrub receives adequate moisture for maximum fruit production all fall long.

PHOTO: Rudbeckia hirta 'Autumn Colors'.

Black-eyed Susan (Rudbeckia hirta ‘Autumn Colors’)

Rudbeckia cultivars
Black-eyed Susans and coneflowers

With familiar daisy-like flowers that will bloom through all of fall, it is no wonder that species of Rudbeckia are a fall favorite. Petal colors can range from shades of bright yellow to orange-gold, and some cultivars have flushes of red on the petals. Rudbeckia will respond well to deadheading or alternatively, leave the dried flower heads on the plant to attract migrating birds to your garden. This will also allow the flowers to reseed because not all cultivars of Rudbeckia will act as perennials in colder climates.  These flowers are low maintenance if planted in well-drained soil.

PHOTO: Imperata cylindrica 'Rubra', or Japanese blood grass.

Japanese blood grass (Imperata cylindrica ‘Rubra’)
Photo by Jim Hood, via Wikimedia Commons

Imperata cylindrica ‘Rubra’
Japanese blood grass

Japanese blood grass is another low maintenance ornamental grass. Usually smaller in stature than switchgrass, it introduces a dramatic splash of deep red into your landscape. Although nonnative and normally a fiercely invasive plant, this cultivar does not produce seed and spreads slowly. This grass is best used as a border plant in well-drained soils.


©2016 Chicago Botanic Garden and my.chicagobotanic.org

The start of a new year prompted us to ask experts here at the Chicago Botanic Garden what they expect to see in 2015. Their predictions might help you anticipate problems, promote pollinators, and add interest to your own patch of green.

What’s likely to trend? Rainwater management, cumulative stress problems, corresponding color schemes, new compact hybrids, and heightened concern for butterflies, birds, and bees.

“Two fundamental issues will drive gardening trends in 2015—erratic weather patterns and a growing concern for the environment,” said Tom Tiddens, supervisor of plant health care. Additionally, gardeners will move away from contrasting color schemes and increase their use of outdoor spaces for entertaining and relaxing. Here’s a closer at what our experts anticipate for the coming season:

Cumulative Stress

Several years of erratic weather—drought followed by prolonged, record-breaking cold—have had a cumulative stress effect on many plants, especially evergreens. “I think we will be seeing more stress-related problems in 2015,” Tiddens said. Stress causes a lack of plant vigor, increasing plants’ susceptibility to pests and diseases.

PHOTO: Brown marmorated stink bug.

Be on the lookout for brown marmorated stink bug ( Halyomorpha halys ). Photo by David R. Lance, USDA APHIS PPQ

Give your plants extra TLC and be on the lookout for viburnum leaf beetle, expected to hit the Chicago region soon. Other high-consequence plant pests and pathogens to watch for include brown marmorated stink bug, lantern fly, and thousand cankers disease. Emerald ash borer and Asian longhorn beetle remain threats.

Rainwater Management

More home gardeners will take steps to either improve or prevent the lake that seems to form in their yard every time it rains, said Heather Sherwood, senior horticulturist. Rain barrels and rain gardens will be two increasingly popular solutions. Rain gardens temporarily hold rainwater and rely on specialized native plants to wick water into the soil. Rain gardens offer many environmental benefits, soaking up 30 percent more water than a typical lawn, and minimizing the pollutants that flow into storm drains. The native plants used in rain gardens provide habitat for birds, bees, and beneficial insects. To learn more, go to: chicagobotanic.org/conservation/rain_garden or chicagobotanic.org/library/spotlight/raingardens.

Corresponding Color Schemes

PHOTO: Dahlia 'Gitt's Crazy'.

Monochromatic color schemes are in! Experiment with the 2015 Pantone Color of the Year: “Marsala.” (Shown: Dahlia ‘Gitt’s Crazy’)

Gardeners will move toward more monochromatic displays, such as using shades of oranges alone, or shades of purples and blues together in the same design, according to Tim Pollak, outdoor floriculturist. Increased use of leaf interest will provide texture and shades of green. Sherwood sees red: from the earliest tulips to azaleas, dahlias, Japanese maples, large maples in the fall, and lastly, the red twigs of dogwood for seasonal interest.

Pollak also predicts home gardeners will use their outdoor spaces more and more for relaxing and entertaining, increasing the demand for outdoor décor. The Antiques, Garden & Design Show, April 17–19, 2015, will offer ideas and one-of-a-kind garden elements.

Less Is More

Jacob Burns, curator of herbaceous perennials, is excited to see new compact hybrids to make their way into the U.S. market next year, and expects them to catch on with home gardeners. New breeding efforts have produced dwarf versions of Japanese anemones (Anemone x hybrida) that are perfect for containers, or the front of the border. Rare among these fall-blooming windflowers is Anemone ‘Wild Swan’, which produces white blooms with a beautiful blue backing. Burns also welcomes new compact cultivars of little bluestem (Schizachyrium scoparium) available in 2015. ‘Cinnamon Girl’ reaches a height of just 28 inches, and transitions to red-purple foliage by late summer. Also on his list are cultivars ‘Twilight Zone’ and ‘Smoke Signal’.

Birds, Bees, and Butterflies

PHOTO: A honeybee from the Fruit & Vegetable Garden hives pollinates some Echinacea purpurea

A honeybee from the Fruit & Vegetable Garden hives pollinates some Echinacea purpurea.

The increased availability of equipment and support—both online, and at better garden centers and the Chicago Botanic Garden—will help boost the number of backyard beekeepers, said Lisa Hilgenberg, horticulturist, Regenstein Fruit & Vegetable Garden. Hand in hand with the hives will be the continued rise of bird- and pollinator-friendly gardens filled with nectar-rich and native host plants. Pollak predicts a continued upward trend in demand for organic, pesticide-free and non-GMO (genetically modified organisms) plants and products. Gardeners looking for more information may be interested in attending a Beginning Beekeeping Workshop on February 7, 2015.

©2015 Chicago Botanic Garden and my.chicagobotanic.org